Off-grid site report
Carroll County, IA
42.0651, -94.8666 · 1,253 ft elevationRead this before you act on anything below. This is my researched starting point for Carroll County, IA, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
The local rulesCarroll County, IA
Zoning & raw-land occupancy
Varies locallyCarroll County has countywide zoning (Ordinance No. 14) for unincorporated land, administered by the County Zoning Administrator, requiring a building permit before construction; agricultural buildings are exempt per Iowa Code. Inside the City of Carroll, a separate city zoning code and Planning & Zoning Commission apply. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official county page addresses tiny houses or RV occupancy specifically. Manufactured homes on newer parcels must meet site-built standards for foundation, setback, and size, and statewide the Building Code Bureau must inspect and approve any manufactured home before occupancy. source
Building permits & codes
Generally allowedThe county requires a building permit for new construction or expansion on unincorporated land, administered via the contracted Region XII COG zoning administrator; the county itself does not maintain a separate building code. The City of Carroll has adopted the State Building Codes and requires permits for new buildings and larger alterations. source
Septic & composting toilets
Generally allowedSeptic systems are permitted through the Carroll & Crawford County Environmental Health Department under a county ordinance tied to Iowa Code Chapter 455B.172, with inspection required at property transfer and effluent filters required on new systems since 2009. source
Greywater reuse
Unclear - verifyNo Carroll County or Iowa DNR page specifically addresses greywater reuse; it likely falls under general private sewage disposal permitting but this is not confirmed. Ask the Environmental Health Department directly.
Rainwater harvesting
Unclear - verifyNo official Carroll County or state source addresses residential rainwater catchment permitting or restrictions; status is not confirmed.
Private wells & water rights
Generally allowedPrivate wells are permitted through the county Environmental Health Department using the state's Iowa Well Information System, with free testing available; local wells run above the state average for coliform and nitrate contamination. source
Living disconnected from utilities
Varies locallyNo county ordinance explicitly bans disconnecting from utilities, but occupying a residence still requires a zoning-compliant building permit outside city limits plus separate septic and well permits; unsanitary conditions are investigated jointly by the county, Iowa DNR, and EPA. source
Sun30-year normals
- Peak-sun hours, annual average
- 4.9 hrs/day
- Worst month (sizes an off-grid array)
- 3.4 hrs/day
- Yearly output per 1 kW of panels
- 1,421 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 34 in/yr
- Snowfall
- 29 in/yr
- Heating degree days
- 7,087 (cold)
- Frost-free season
- Apr 28 to Oct 3
How far help isstraight-line
- Hospital
St. Anthony Regional Hospital - 0.6 mi
- Fire station
Carroll Fire Station - 1.0 mi
- Hardware store
Bomgaars - 0.6 mi
- Grocery
Hy-Vee - 0.7 mi
From OpenStreetMap. Road miles will be longer, often much longer in hill country.
Plan this spot
These open with this location's real numbers already filled in (ZIP 51401).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Carroll County, IA?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →Share or save this report:New report
Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.
New here, or not sure where this fits? Start here walks through the whole thing in order.